Technical data

Shelf Management Alarm Module
AXP 1410 Installation and Use (6806800H70D)
182
Using the above algorithm, at 40°C ambient, the cooling algorithm adjusts the fan speeds to
maintain a deltaT rise in temperature at 15°C.
The values for S1, S2, T1, and T2 are configurable.
In abnormal operating conditions; that is, when a blade thermal sensor is approaching or
crossed its upper non-critical threshold, the SAM automatically adjusts the fan speeds to a
point where all the blade thermal sensors are just below their upper non-critical threshold
(minus a user configurable offset).
The dynamic minimum fan level is not used.
Each fan tray has six fan units and each fan unit has an inlet and outlet fan. Fan speeds for all
level settings are summarized in the next table.
Table 8-7 Cooling Budget
Ambient Temperature Temperature Rise
25°C Delta T = 20° C
40°C Delta T = 15° C
55°C Delta T = 10° C
Fan Level Speed in RPMs
1 1800 Inlet, 1100 Outlet +/-10%
10 2600 Inlet, 1500 Outlet +/-10%
20 3200 Inlet, 2000 Outlet +/-8%
30 3900 Inlet, 2400 Outlet +/-8%
40 4500 Inlet, 2900 Outlet +/-5%
50 5100 Inlet, 3300 Outlet +/-5%
60 5800 Inlet, 3700 Outlet +/-5%
70 6400 Inlet, 4200 Outlet +/-5%
80 7000 Inlet, 4500 Outlet +/-5%
90 7600 Inlet, 5000 Outlet +/-5%
100 8000 Inlet, 5200 Outlet +/-5%